BEGIN;
BEGIN
EXPLAIN (ANALYZE, BUFFERS)
select
	o_orderpriority,
	count(*) as order_count
from
	orders
where
	o_orderdate >= date '1993-02-01'
	and o_orderdate < cast(date '1993-02-01' + interval '3 month' as date)
	and exists (
		select
			*
		from
			lineitem
		where
			l_orderkey = o_orderkey
			and l_commitdate < l_receiptdate
	)
group by
	o_orderpriority
order by
	o_orderpriority;
                                                                                  QUERY PLAN                                                                                  
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
 Sort  (cost=1127194.79..1127194.79 rows=1 width=16) (actual time=9434.957..9434.957 rows=5 loops=1)
   Sort Key: orders.o_orderpriority
   Sort Method: quicksort  Memory: 25kB
   Buffers: shared hit=2564668 read=396264 written=6901
   ->  HashAggregate  (cost=1127194.77..1127194.78 rows=1 width=16) (actual time=9434.888..9434.888 rows=5 loops=1)
         Group Key: orders.o_orderpriority
         Buffers: shared hit=2564663 read=396264 written=6901
         ->  Nested Loop Semi Join  (cost=11891.92..1126442.29 rows=150495 width=16) (actual time=294.661..9153.089 rows=509341 loops=1)
               Buffers: shared hit=2564663 read=396264 written=6901
               ->  Bitmap Heap Scan on orders  (cost=11891.35..275041.65 rows=557553 width=20) (actual time=294.548..2009.983 rows=555201 loops=1)
                     Recheck Cond: ((o_orderdate >= '1993-02-01'::date) AND (o_orderdate < '1993-05-01'::date))
                     Heap Blocks: exact=227620
                     Buffers: shared hit=182376 read=46789 written=12
                     ->  Bitmap Index Scan on orders_o_orderdate_o_orderkey_idx  (cost=0.00..11751.96 rows=557553 width=0) (actual time=216.984..216.984 rows=558458 loops=1)
                           Index Cond: ((o_orderdate >= '1993-02-01'::date) AND (o_orderdate < '1993-05-01'::date))
                           Buffers: shared read=1545
               ->  Index Scan using lineitem_l_orderkey_idx_part1 on lineitem  (cost=0.56..4.61 rows=5 width=4) (actual time=0.012..0.012 rows=1 loops=555201)
                     Index Cond: (l_orderkey = orders.o_orderkey)
                     Buffers: shared hit=2382287 read=349475 written=6889
 Planning time: 2.609 ms
 Execution time: 9436.883 ms
(21 rows)

COMMIT;
COMMIT